SchemaValid
ENDE

Blog

Practical guides on structured data, technical SEO, and the tools behind them.

Analytics & Tracking

UTM Checker: The Errors That Quietly Corrupt Your Campaign Data

A free UTM checker that catches the self-referral trap, casing mismatches, and other tagging errors before GA4 quietly buries them in an Unassigned bucket.

8 min read

Content & Keywords

How Many Words Per Page? It Depends on the Format

"A page" isn't a unit of measurement. It's a manuscript convention, a font size, a margin setting, or a printed trim size, and each one gives you a different number of words. Here's every figure, sourced.

9 min read

Technical SEO

Sitemap Validator: The Errors That Actually Hurt Indexing

A free sitemap validator that separates errors that break parsing from the ones Google just shrugs at — plus what actually blocks indexing.

9 min read

Content & Keywords

LinkedIn Post Character Limit: What Actually Fits in 2026

LinkedIn lets you type 3,000 characters into a post. The feed shows a small fraction of that before it folds. Here's every LinkedIn character limit that's actually documented, and which ones aren't.

9 min read

Technical SEO

Hreflang Sitemap Entries vs. HTML Tags: Which One to Use

The XML sitemap syntax for hreflang, why the reciprocal-tag rule is non-negotiable, and when sitemap-based hreflang actually beats HTML link tags.

8 min read

Structured Data

LocalBusiness Schema: What It Is and How to Add It to Your Site

What LocalBusiness markup does, the four fields a valid block needs, how to pick the right subtype, and the mistakes that quietly break rich results.

5 min read

Basics

BIC Code vs SWIFT Code: What's the Difference and Where to Find Yours

BIC and SWIFT are two names for the same code. How its 8 or 11 characters are built, where to find yours, and when you need it next to your IBAN.

4 min read